The first row in the table that describes the contents of the rows below can be formatted using the _____ element. 1. table header 2. table row element 3.header 4. table data If the table contains numeric data which of the following is the most appropriate style for the table data element? 1. td { text-align: left: } 2. td { text-align: center: } 3. td { text-align: right: } 4.td { text-align: default: } Table _____ are horizontal and vertical lines that surround the table. 1. borders 2. lines 3. gridlines 4. edges To merge cells across columns the _____ attribute(s) is(are) used 1.span 2. rowspan 3. both rowspan and colspan 4. colspan The colspan attribute and its value should be always entered in the _____ cell. 1. default 2. key 3. start